tuning calcium reactor

[Mandrake]

i’m trying to measure my effluent all with Salifert
test kit but can’t get a reading (too high dkh ) for test kit to read, i have tried 2mil of effluent instead of 4 with 4 drops of kh1 and 2mil of effluent with 2 drops of kh 1 still no color change?

 

[LouieP]

Heres the best way to tune your CaRx

 

[dragon99]

It may take more than 1ml (entire syringe) of the reagent. If the color hasn't changed after using the first syringe, then just refill it and add them together.